Hydrometer



V. H. MEYER.

H YDROMETER.

APPLICATION FILED NOV. 29, |920.

Patented Sept. 20, 1921.

UNITED STAT-ES To all whom t may concern:

Be it known that I, VERNON` I-I. MEYER, a citizen of the Unitedi States,residing at Cleveland, in the county of'Cuyahoga and State of Ohio, haveinvented' certain new and useful Improvements in Hydrometers,

. of which the following is a specification. f

This invention relates to hydrometers,

land isy particularly useful in connection with hydrometers of the typeused for testing storage batteries. Ordinary hydrometers have theobjection that ,they are liable to become broken if dropped, andfurthermore the float breaks by contact withy the barrel in handling theinstrument. Some hydrometers have been provided in l which the lowerpart of the `barrel is made from solid rubber, but these havethe'objection that the lower end of the float cannot be seen, and so it1s often not known whether the` float has lifted or whether it is stillrestingon the bottom of the barrel.

he object of the present invention is t0 L provideY a fhydrometer havingmeans to prevent breakage thereof, either 0f the barrel or the ioat, andalso to prevent the hydrometer rolling around on a smooth surface.

One of the principal features ofthe invention is a rubber liner which isplaced in the lower part of the barrel and which prevents contactbetween the float and the glas wall of the barrel. f

A further feature of the invention is the provision of a cap or band atthe top of the float, which will prevent contact of the upper endthereof with the wall 'of the barrel.

A further feature of the invention is the position of means to preventthe float from enteringl the compresslble bulb at the top of the barrel,which sometimes results in breakage of the float when the `bulb isgrasped.

By these and other means `to be described the oat is practicallyprotected in all positions and it is almost impossible to accidentallybreak either the iioat or the barrel of the instrument, and at the sametime the barrel is free from the objections incident to lmaking it intwo sections, which often results in leakage at the joint.

The invention is illustrated in the accompanying drawings in whichFigure l is a longitudinal section of the hydrometer. Fig. 2 is asection on the line 2 2 of Fig. 1. Fig. 3 is al plan of the rubberliner.

Specification of Letters Patent.

PATENT o FFIFCE.

y Patented sept. 20, 1921.

i Application` mea Noveniber 29, 1920. serial No..427,o72.

providedl at its upper end with a compressiv ble bulb 7 and at its lowerend with a tube 8, as usual. The bulb is protected exteriorly' byangular shields 9 and 10, made of rubber, one vof which fits on the neck11 at the lower end of the barreland the other on ythe neck 12 at thetop thereof. lThese shieldsare of suficient size to hold the barrel outof contactv with the surface on which the instrument is laid, and willalso prevent contact of the barrel with a surface on which theinstrument may be accidentally dropped. These shields therefore preventmuch of the breakage incident to accidental dropping of the instrument.A glass float 13 is contained in the barrel as usual. The lower part ofthis fio-at is prevented from contact with the glass wall of the barrelby means of a circular liner 14, consisting of a perforated sheet ofrubber which is rolled to a cylindrical form and inserted in the lowerpart ofthe barrel. The openings 15 in the liner are for the purpose ofpermitting inspection of the float, so that it can be seen when the sameis actually floating. 'A plu 16 of rubber is also fitted in the lower enof the barrel, so that the float cannot strike the bottom thereof whenthe liquid is discharged from the barrel.

At its upper end the float is provided with a ring or cap 17 of rubberwhichalso prevents contact of that end of the float with the upper partof the barrel. `And furthermore a plug 18 of rubber is fitted in theneck 12 at the top of the barrel and so revents the iloat risin into thebulb 7 or di'opping4 thereinto if te hydrometer should beinverted. Thisplug 18 has holes 19 to enable the bulb 7 to performits function' Thefloat is thus practically surrounded by 'rubber protectors, inconsequence of which there is little possibility of the ioat beingbroken by shock or by contact of the barrel of the instrument, and thebarrel is also exteriorly protected by the means above described. Theseadvantages will be appreciated by persons using such instruments, whoare aware of thel objections incident to frequent breakage of the parts.

I claim: I

1. The combination with a hydrometer barrel, bulb and float, of acushion liner in the barrel, extending suiciently above the bottom'ofthe barrel to prevent contact ofl the float with any part of the wallof` they barrel.

2. The combination with a hydrometer barrel, bulb and Hoat, of a cushionliner in the barrel, of suicient extent to obscure a portion. of theioat and to prevent Contact of the float with the wall of the barrel,said liner having holes through the same through which the position ofthe float may be seen.

3. The combination with a hydrometer barrel and float, of a liner in thelower part 5 of the barrel; of suicient extent to obscure a portion ofthe' float and to 'prevent Contact of the oat with the wall of thebarrel, said 15 Y linen consisting of a perforated' sheet of rubberinserted within the barrel.

In testimony whereof, I aIiX my signature in presence of two witnesses.

VERNON MEYER. Witnesses: p A

JOHN, A. BOMMHARDT, v

' HARRY G. SoHoWE.

